Journal article
Theory for the change of the bond charater in divalent-metal clusters



Publication Details
Authors:
Garcia, M.; Pastor, G.; Bennemann, K.
Publisher:
AMERICAN PHYSICAL SOC
Publication year:
1991
Journal:
Physical Review Letters
Pages range:
1142-1145
Journal acronym:
PRL
Volume number:
67
Start page:
1142
End page:
1145
Number of pages:
4
ISSN:
0031-9007
eISSN:
1079-7114

Abstract
To determine the size dependence or the bonding in divalent-metal clusters we use a many-electron Hamiltonian describing the interplay between van der Waals (vdW) and covalent interactions. Using a saddle-point slave-boson method and taking into account the size-dependent screening of charge fluctuations, we obtain for Hg(n) a sharp transition from vdW to covalent bonding for increasing n. We show also, by solving the model Hamiltonian exactly, that for divalent metals vdW and covalent bonding coexist already in the dimers.

Last updated on 2019-10-03 at 17:21